chore(deps): bump step-security/harden-runner from 2.19.0 to 2.19.4 (hiero-ledger#2347)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/on-review.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@8d3c67de8e2fe68ef647c8db1e6a09f647780f40 # v2.19.0
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
         with:
           egress-policy: audit
 

.github/workflows/test-on-review.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@8d3c67de8e2fe68ef647c8db1e6a09f647780f40 # v2.19.0
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
         with:
           egress-policy: audit